package com.usercon.userconter.Utils;


import java.security.MessageDigest;

public class MD5Util {

    private static final String hexDigits[] = {
            "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"
    };
    private static String byteArrayToHexString(byte b[]){
        StringBuffer resultSb = new StringBuffer();
        for(int i = 0; i < b.length;i++)
            resultSb.append(byteToHexString(b[i]));
        return resultSb.toString();
    }

    private static String byteToHexString(byte b){
        int n = b;
        if(n<0)
            n+=256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin,String charsetname){
        String resultString = null;
        try{
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if(charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
        }catch (Exception exception){

        }
        return resultString;
    }
}
